More NULL questions

[Doug Gwyn]

In article <448 at shodha.dec.com> devine at shodha.dec.com (Bob Devine) writes:
-In article <903 at abvax.UUCP>, aep at ivan (Alex E. Pensky) writes:
-> Even if pointers and integers are the same size and have the same 
-> representation, you are still in trouble if your compiler passes int
-> parameters and pointer parameters via different mechanisms.
-  What different mechanisms?  C only supports call-by-value for
-parameters (I'm ignoring the special casing of arrays here).  How
-can pointers be passed differently than ints?  It sounds like you
-used a broken compiler.

[This list sure has been getting a lot of GUESSWORK posted to it recently.]

A simple example is that the first M integer parameters might be passed
in data registers and the first N pointer parameters passed in address
registers.  Yes, there are compilers that follow conventions like this,
and even stranger ones.  They are not "broken".